We see White Ibis very frequently when we're in Florida -- in our RV Park, on street corners, in yards everywhere as well as in the parks where we walk.
When I first saw these dark-colored Ibis (by themselves) around town, I thought they were another variety. But then I looked them up and decided they were first-year juvenile white ibis.
Here is one in a family group (on the street in the RV Resort where we live when we are in Florida.) Seems fairly clear that he belongs to the clan.